package qcr;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import javax.imageio.ImageIO;

import com.google.zxing.common.BitMatrix; 
public final class ImageWrite {
    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;
    private ImageWrite() {}
    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth(); 
        int height = matrix.getHeight();  
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); 
        for (int x = 0; x < width; x++) { 
            for (int y = 0; y < height; y++) { 
                image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); 
            }   
        } 

        return image;
    }      
    public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException { 
        BufferedImage image = toBufferedImage(matrix); 
        if (!ImageIO.write(image, format, file)) {    
            throw new IOException("Could not write an image of format " + format + " to " + file);  
        }  
    }     
    public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)throws IOException {
        BufferedImage image = toBufferedImage(matrix); 
        if (!ImageIO.write(image, format, stream)) {      
            throw new IOException("Could not write an image of format " + format);  
        }   
    }  
}